Implement support for immutable entities [DATAJDBC-241]

[spring-projects-issues]

Jens Schauder opened DATAJDBC-241 and commented

DATAJDBC-233 modified the public API. This issue is for changing the actual implementation which will require AggregateChange/DbAction to learn not just about their relevant PropertyPath but also the entities and Map keys or List indexes in that path in order to assemble a proper new Aggregate root after performing all DbActions

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Issue Links:

• DATAJDBC-233 API changes for future proper support for immutable entities
  ("depends on")
• DATAJDBC-249 Improve design of DbAction handling
  ("is depended on by")

Referenced from: pull request #84